EP0707673B1 - Production of paper - Google Patents
Production of paper Download PDFInfo
- Publication number
- EP0707673B1 EP0707673B1 EP94919768A EP94919768A EP0707673B1 EP 0707673 B1 EP0707673 B1 EP 0707673B1 EP 94919768 A EP94919768 A EP 94919768A EP 94919768 A EP94919768 A EP 94919768A EP 0707673 B1 EP0707673 B1 EP 0707673B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- suspension
- anionic
- retention aid
- process according
- monomer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/06—Paper forming aids
- D21H21/10—Retention agents or drainage improvers
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/37—Polymers of unsaturated acids or derivatives thereof, e.g. polyacrylates
- D21H17/375—Poly(meth)acrylamide
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/41—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups
- D21H17/42—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups anionic
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
- D21H17/68—Water-insoluble compounds, e.g. fillers, pigments siliceous, e.g. clays
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
- D21H23/04—Addition to the pulp; After-treatment of added substances in the pulp
- D21H23/06—Controlling the addition
- D21H23/14—Controlling the addition by selecting point of addition or time of contact between components
Abstract
Description
Sample Polymer Type | Ionic Content (sign and mole%) | Intrinsic Viscosity (dl/g) |
ACM/NaAC (comparative) | -23.6 | 17.0 |
ACM/NaAC (comparative) | -17.6 | 12.0 |
ACM/NaAC | -7.9 | 12.0 |
ACM/NaAC | -3.0 | 13.0 |
| 0 | 12.0 |
ACM/DMAEAqMeCl | +1.4 | 11.0 |
ACM/DMAEAqMeCl (comparative) | +2.7 | 6.0 |
ACM/DMAEAqMeCl (comparative) | +9.7 | 8.0 |
ACM/DMAEAqMeCl (comparative) | +20.9 | 6.5 |
ACM/DMAEAqMeCl (comparative) | +59.5 | 7.0 |
Polymer Ionic Content (mole %) | Total Retention (%) |
0 | 57.7 |
0.37 | 59.7 |
0.74 | 59.2 |
1.12 | 57.4 |
1.50 | 55.6 |
1.89 | 54.9 |
2.28 (comparative) | 55.8 |
2.68 (comparative) | 55.3 |
3.08 (comparative) | 56.4 |
Polymer Ionic Content (mole %) | Total Retention (%) |
0 | 81.3 |
+ 0.37 | 84.3 |
+ 0.74 | 81.7 |
+ 1.12 | 81.0 |
+ 1.50 | 77.9 |
+ 1.89 | 77.4 |
+ 2.28 (comparative) | 76.6 |
+ 2.68 (comparative) | 78.4 |
+ 3.08 (comparative) | 77.1 |
Polymer Ionic Content (mole %) | Percentage Drain Time (% seconds) |
+ 26.8 | 57 |
- 7.74 | 34 |
- 33.5 | 35 |
Claims (19)
- A process for making paper comprising forming an aqueous cellulosic suspension,adding to the suspension a polymeric retention aid having an IV of at least 6dl/g to form flocs,shearing the suspension to break down the flocs to form microflocs,aggregating the microflocs by adding to the suspension an anionic particulate material, anddraining the suspension to form a sheet and white water which drains through the screen anddrying the sheet, whereinthe polymeric retention aid is a water-soluble non-ionic polymer or substantially non-ionic (polymer) formed of non-ionic ethylenically unsaturated monomer and less than 2 mole percent ethylenically unsaturated cationic monomer and/or less than 10 mole percent ethylenically unsaturated anionic monomer, and the suspension to which the retention aid is added is a suspension that contains anionic trash such that the white water has a conductivity of at least 1500 microsiemen.
- A process according to claim 1 in which the suspension to which the retention aid is added is a suspension such that, after treatment with the said retention aid at a dose of 400 grams per tonne dry weight, the suspension gives a Schopper Riegler drainage time that is shorter than the drainage time obtained when the same suspension is treated with the same dosage of each of cationic and anionic test retention aids of substantially the same IV as the substantially non-ionic retention aid, wherein the cationic test retention aid is formed from monomer containing 5 mole percent cationic monomer and 95 mole percent non-ionic monomer and the anionic test retention aid is formed from monomer which contains up to 25 mole percent (preferably 15 mole percent) anionic monomer and at least 75 mole percent non-ionic monomer.
- A process according to claim 1 in which the white water has a conductivity of 2000 to 3000 microsiemens.
- A process according to any preceding claim in which the suspension is formed predominantly from a mechanical pulp and/or a thermo-mechanical pulp and/or a de-inked waste.
- A process according any preceding claim in which the suspension contains at least 5% by weight calcium sulphate or carbonate filler.
- A process according to claim 1 conducted in a closed mill in which white water from the drainage stage is repeatedly recycled and used with freshly introduced water, and the process utilises less than 30 tons freshly introduced water per ton paper.
- A process according to claim 2 conducted in a closed mill in which white water from the drainage stage is repeatedly recycled and used with freshly introduced water, and the process utilises less than 30 tons freshly introduced water per ton paper.
- A process according to any preceding claim in which the suspension contains alum and the paper is liner board.
- A process according to any preceding claim in which the anionic particulate material is an anionic swelling clay.
- A process according to any preceding claim conducted in a closed mill in which white water from the drainage stage is repeatedly recycled for diluting thickstock and the suspension contains at least 5% by weight calcium sulphate or carbonate filler.
- A process for making paper comprising forming an aqueous cellulosic suspension,adding to the suspension a polymeric retention aid having an IV of at least 6dl/g to form flocs,shearing the suspension to break down the flocs to form microflocs,aggregating the microflocs by adding to the suspension an anionic particulate material, anddraining the suspension to form a sheet and white water which drains, through the screen anddrying the sheet,wherein the polymeric retention aid is a water soluble non-ionic polymer or substantially nonionic polymer formed of nonionic ethylenically unsaturated monomer with less than 2 mole percent cationic monomer and/or less than 10 mole percent anicnic monomer, andthe suspension to which the retention aid is added is a suspension such that, after treatment with the said retention aid at a dose of 400 grams per tonne dry weight, the suspension gives a Schopper Riegler drainage time that is shorter than the drainage time obtained when the same suspension is treated with the same dosage of each of cationic and anionic test retention aids of substantially the same IV as the substantially non-ionic retention aid, wherein the cationic test retention aid is a polymer which is formed from 5 mole percent cationic monomer and 95 mole % nonionic monomer and the anionic test retention aid contains 15 mole percent anionic monomer and 85 mole percent nonionic monomer.
- A process according to claim 11 in which the white water has a conductivity of at least 1500 microsiemens.
- A process according to claim 11 in which the white water has a conductivity of 2000 to 3000 microsiemens.
- A process according to claim 11 in which the suspension is formed predominantly from a mechanical pulp and/or a thermo-mechanical pulp and/or a de-inked waste.
- A process according to claim 11 in which the suspension contains at least 5% by weight calcium sulphate or carbonate filler.
- A process according to claim 12 conducted in a closed mill in which white water from the drainage stage is repeatedly recycled and used with freshly introduced water, and the process utilises less than 30 tons freshly introduced water per ton paper.
- A process according to claim 13 conducted in a closed mill in which white water from the drainage stage is repeatedly recycled and used with freshly introduced water, and the process utilises less than 30 tons freshly introduced water per ton paper.
- A process according to claim 12 conducted in a closed mill in which white water from the drainage stage is repeatedly recycled for diluting thickstock and the suspension contains at least 5% by weight calcium sulphate or carbonate filler and the white water has a conductivity of at least 1500 microsiemens.
- A process according to claim 11 in which the anionic particulate material is an anionic swelling clay.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB939313956A GB9313956D0 (en) | 1993-07-06 | 1993-07-06 | Production of paper |
GB9313956 | 1993-07-06 | ||
PCT/GB1994/001457 WO1995002088A1 (en) | 1993-07-06 | 1994-07-06 | Production of paper |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0707673A1 EP0707673A1 (en) | 1996-04-24 |
EP0707673B1 true EP0707673B1 (en) | 1998-04-22 |
Family
ID=10738371
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94919768A Expired - Lifetime EP0707673B1 (en) | 1993-07-06 | 1994-07-06 | Production of paper |
Country Status (15)
Country | Link |
---|---|
US (1) | US5514249A (en) |
EP (1) | EP0707673B1 (en) |
JP (1) | JP3675817B2 (en) |
KR (1) | KR100326204B1 (en) |
AT (1) | ATE165407T1 (en) |
AU (1) | AU696483B2 (en) |
BR (1) | BR9407000A (en) |
DE (1) | DE69409808T2 (en) |
DK (1) | DK0707673T3 (en) |
ES (1) | ES2115238T3 (en) |
FI (1) | FI119442B (en) |
GB (1) | GB9313956D0 (en) |
NO (1) | NO318122B1 (en) |
NZ (1) | NZ268058A (en) |
WO (1) | WO1995002088A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7442280B1 (en) * | 1998-04-27 | 2008-10-28 | Akzo Nobel Nv | Process for the production of paper |
Families Citing this family (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6074527A (en) | 1994-06-29 | 2000-06-13 | Kimberly-Clark Worldwide, Inc. | Production of soft paper products from coarse cellulosic fibers |
US6001218A (en) | 1994-06-29 | 1999-12-14 | Kimberly-Clark Worldwide, Inc. | Production of soft paper products from old newspaper |
US5582681A (en) | 1994-06-29 | 1996-12-10 | Kimberly-Clark Corporation | Production of soft paper products from old newspaper |
US6193844B1 (en) | 1995-06-07 | 2001-02-27 | Mclaughlin John R. | Method for making paper using microparticles |
US5968316A (en) * | 1995-06-07 | 1999-10-19 | Mclauglin; John R. | Method of making paper using microparticles |
US6296736B1 (en) | 1997-10-30 | 2001-10-02 | Kimberly-Clark Worldwide, Inc. | Process for modifying pulp from recycled newspapers |
GB9624832D0 (en) * | 1996-11-28 | 1997-01-15 | Allied Colloids Ltd | Production of paper and paper board |
US5900116A (en) | 1997-05-19 | 1999-05-04 | Sortwell & Co. | Method of making paper |
GB9719472D0 (en) * | 1997-09-12 | 1997-11-12 | Allied Colloids Ltd | Process of making paper |
EP0953680A1 (en) * | 1998-04-27 | 1999-11-03 | Akzo Nobel N.V. | A process for the production of paper |
US7306700B1 (en) | 1998-04-27 | 2007-12-11 | Akzo Nobel Nv | Process for the production of paper |
US20030150575A1 (en) * | 1998-06-04 | 2003-08-14 | Snf Sa | Paper and paperboard production process and corresponding novel retention and drainage aids, and papers and paperboards thus obtained |
FR2779452B1 (en) * | 1998-06-04 | 2000-08-11 | Snf Sa | PROCESS FOR PRODUCING PAPER AND CARDBOARD AND NOVEL RETENTION AND DRIPPING AGENTS THEREOF, AND PAPER AND CARDBOARD THUS OBTAINED |
FR2779752B1 (en) * | 1998-06-12 | 2000-08-11 | Snf Sa | PROCESS FOR PRODUCING PAPER AND CARDBOARD AND NOVEL RETENTION AGENTS THEREOF, AND PAPER AND CARDBOARD THUS OBTAINED |
CA2676732C (en) * | 1998-06-12 | 2014-04-15 | Georgia-Pacific Consumer Products Lp | Method of making a paper web having a high internal void volume of secondary fibers and a product made by the process |
US6168686B1 (en) | 1998-08-19 | 2001-01-02 | Betzdearborn, Inc. | Papermaking aid |
US6387210B1 (en) | 1998-09-30 | 2002-05-14 | Kimberly-Clark Worldwide, Inc. | Method of making sanitary paper product from coarse fibers |
US6514384B1 (en) * | 1999-03-19 | 2003-02-04 | Weyerhaeuser Company | Method for increasing filler retention of cellulosic fiber sheets |
US6379501B1 (en) | 1999-12-14 | 2002-04-30 | Hercules Incorporated | Cellulose products and processes for preparing the same |
US6358365B1 (en) | 1999-12-14 | 2002-03-19 | Hercules Incorporated | Metal silicates, cellulose products, and processes thereof |
US6846384B2 (en) * | 2000-08-07 | 2005-01-25 | Akzo Nobel N.V. | Process for sizing paper |
US20020166648A1 (en) * | 2000-08-07 | 2002-11-14 | Sten Frolich | Process for manufacturing paper |
GB0115411D0 (en) * | 2001-06-25 | 2001-08-15 | Ciba Spec Chem Water Treat Ltd | Manufacture of paper and paper board |
US20040133439A1 (en) * | 2002-08-21 | 2004-07-08 | Dirk Noetzold | Method and system for valuation of complex systems, in particular for corporate rating and valuation |
WO2005071160A2 (en) * | 2004-01-23 | 2005-08-04 | Buckman Laboratories International, Inc. | Process for making paper |
CA2803904C (en) | 2010-07-26 | 2014-01-28 | Sortwell & Co. | Method for dispersing and aggregating components of mineral slurries and high-molecular weight multivalent anionic polymers for clay aggregation |
US8721896B2 (en) | 2012-01-25 | 2014-05-13 | Sortwell & Co. | Method for dispersing and aggregating components of mineral slurries and low molecular weight multivalent polymers for mineral aggregation |
US10961662B1 (en) | 2019-12-23 | 2021-03-30 | Polymer Ventures, Inc. | Ash retention additive and methods of using the same |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4753710A (en) * | 1986-01-29 | 1988-06-28 | Allied Colloids Limited | Production of paper and paperboard |
US4913775A (en) * | 1986-01-29 | 1990-04-03 | Allied Colloids Ltd. | Production of paper and paper board |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3052595A (en) * | 1955-05-11 | 1962-09-04 | Dow Chemical Co | Method for increasing filler retention in paper |
DE3065576D1 (en) * | 1979-03-28 | 1983-12-22 | Allied Colloids Ltd | Production of paper and paper board |
SE432951B (en) * | 1980-05-28 | 1984-04-30 | Eka Ab | PAPER PRODUCT CONTAINING CELLULOSA FIBERS AND A BINDING SYSTEM CONTAINING COLOIDAL MILIC ACID AND COTIONIC STARCH AND PROCEDURE FOR PREPARING THE PAPER PRODUCT |
DE3541163A1 (en) * | 1985-11-21 | 1987-05-27 | Basf Ag | METHOD FOR PRODUCING PAPER AND CARDBOARD |
US4643801A (en) * | 1986-02-24 | 1987-02-17 | Nalco Chemical Company | Papermaking aid |
US4795531A (en) * | 1987-09-22 | 1989-01-03 | Nalco Chemical Company | Method for dewatering paper |
US5032227A (en) * | 1990-07-03 | 1991-07-16 | Vinings Industries Inc. | Production of paper or paperboard |
DE69224063D1 (en) * | 1991-07-02 | 1998-02-19 | Eka Chemicals Ab | METHOD FOR PRODUCING PAPER |
US5234548A (en) * | 1992-01-02 | 1993-08-10 | Vinings Industries Inc. | Production of paper and paperboard |
-
1993
- 1993-07-06 GB GB939313956A patent/GB9313956D0/en active Pending
-
1994
- 1994-07-06 ES ES94919768T patent/ES2115238T3/en not_active Expired - Lifetime
- 1994-07-06 AT AT94919768T patent/ATE165407T1/en active
- 1994-07-06 US US08/268,128 patent/US5514249A/en not_active Expired - Lifetime
- 1994-07-06 AU AU70791/94A patent/AU696483B2/en not_active Ceased
- 1994-07-06 KR KR1019960700027A patent/KR100326204B1/en not_active IP Right Cessation
- 1994-07-06 WO PCT/GB1994/001457 patent/WO1995002088A1/en active IP Right Grant
- 1994-07-06 DE DE69409808T patent/DE69409808T2/en not_active Expired - Lifetime
- 1994-07-06 JP JP50390595A patent/JP3675817B2/en not_active Expired - Fee Related
- 1994-07-06 BR BR9407000A patent/BR9407000A/en not_active Application Discontinuation
- 1994-07-06 NZ NZ268058A patent/NZ268058A/en not_active IP Right Cessation
- 1994-07-06 EP EP94919768A patent/EP0707673B1/en not_active Expired - Lifetime
- 1994-07-06 DK DK94919768T patent/DK0707673T3/en active
-
1996
- 1996-01-05 FI FI960068A patent/FI119442B/en not_active IP Right Cessation
- 1996-01-05 NO NO19960058A patent/NO318122B1/en not_active IP Right Cessation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4753710A (en) * | 1986-01-29 | 1988-06-28 | Allied Colloids Limited | Production of paper and paperboard |
US4913775A (en) * | 1986-01-29 | 1990-04-03 | Allied Colloids Ltd. | Production of paper and paper board |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7442280B1 (en) * | 1998-04-27 | 2008-10-28 | Akzo Nobel Nv | Process for the production of paper |
Also Published As
Publication number | Publication date |
---|---|
DE69409808D1 (en) | 1998-05-28 |
US5514249A (en) | 1996-05-07 |
NZ268058A (en) | 1997-10-24 |
JP3675817B2 (en) | 2005-07-27 |
AU7079194A (en) | 1995-02-06 |
ATE165407T1 (en) | 1998-05-15 |
AU696483B2 (en) | 1998-09-10 |
FI960068A (en) | 1996-01-05 |
NO318122B1 (en) | 2005-02-07 |
FI119442B (en) | 2008-11-14 |
BR9407000A (en) | 1996-09-03 |
FI960068A0 (en) | 1996-01-05 |
NO960058D0 (en) | 1996-01-05 |
DE69409808T2 (en) | 1998-08-13 |
EP0707673A1 (en) | 1996-04-24 |
NO960058L (en) | 1996-01-05 |
JPH08512364A (en) | 1996-12-24 |
ES2115238T3 (en) | 1998-06-16 |
WO1995002088A1 (en) | 1995-01-19 |
DK0707673T3 (en) | 1999-01-25 |
KR100326204B1 (en) | 2002-07-03 |
GB9313956D0 (en) | 1993-08-18 |
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